Hi,

I have a pd-extended patch that used to work perfectly, back when I was on Ubuntu 10.04 (upgraded during the summer). Now it crashes pd when I try to start the gem window a second time.

I simplified the patch to include only pix_video --> pix_texture --> rectangle and the control bits that start and stop the video. This reproduces the crash (attached).

The idea is that the toggle should turn on the gem window and capture video from the built-in webcam -- then, clearing the toggle should stop video processing. You should be able to keep going like that, but it crashes when you enable video a second time.

I can avoid the crash by closing the patch and reopening, but this isn't convenient for long programming sessions where I might need to start and stop the video dozens of times in an hour.

It's probably something simple I'm doing wrong. Would someone mind taking a look at the patch?

Thanks,
hjh

http://www.pdpatchrepo.info/hurleur/pix_video-crash.pd

Further info: With this slightly simpler patch, I can do this:

1. Click [create( to open the gem window manually.
2. Click the toggle to start the camera.
3. Click the toggle to stop the camera -- gem window remains open with the last image displayed.
4. Repeat 2 and 3 -- no crash. So, merely starting and stopping doesn't cause the problem.
5. With the camera stopped, click [destroy( to open the gem window. (No crash.)
6. Still stopped, click [create( to open it again. (No crash.)
7. Click the toggle to start again. **Crash**

That leads me to a workaround -- for now, I'll just have to keep the same gem window open.

But I'm curious why this crashes pd now, when it didn't before.

hjh

http://www.pdpatchrepo.info/hurleur/pix_video-crash3.pd